Merge branch 'js/eol-on-ourselves' into maint

[git-core/git.git] / t / t1450-fsck.sh

diff --git a/t/t1450-fsck.sh b/t/t1450-fsck.sh
index 677e15a..adf0bc8 100755 (executable)
--- a/t/t1450-fsck.sh
+++ b/t/t1450-fsck.sh
@@ -689,17 +689,35 @@ test_expect_success 'bogus head does not fallback to all heads' '
        ! grep $blob out
 '
 
+# Corrupt the checksum on the index.
+# Add 1 to the last byte in the SHA.
+corrupt_index_checksum () {
+    perl -w -e '
+       use Fcntl ":seek";
+       open my $fh, "+<", ".git/index" or die "open: $!";
+       binmode $fh;
+       seek $fh, -1, SEEK_END or die "seek: $!";
+       read $fh, my $in_byte, 1 or die "read: $!";
+
+       $in_value = unpack("C", $in_byte);
+       $out_value = ($in_value + 1) & 255;
+
+       $out_byte = pack("C", $out_value);
+
+       seek $fh, -1, SEEK_END or die "seek: $!";
+       print $fh $out_byte;
+       close $fh or die "close: $!";
+    '
+}
+
+# Corrupt the checksum on the index and then
+# verify that only fsck notices.
 test_expect_success 'detect corrupt index file in fsck' '
        cp .git/index .git/index.backup &&
        test_when_finished "mv .git/index.backup .git/index" &&
-       echo zzzzzzzz >zzzzzzzz &&
-       git add zzzzzzzz &&
-       sed -e "s/zzzzzzzz/yyyyyyyy/" .git/index >.git/index.yyy &&
-       mv .git/index.yyy .git/index &&
-       # Confirm that fsck detects invalid checksum
-       test_must_fail git fsck --cache &&
-       # Confirm that status no longer complains about invalid checksum
-       git status
+       corrupt_index_checksum &&
+       test_must_fail git fsck --cache 2>errors &&
+       grep "bad index file" errors
 '
 
 test_done